Otherworldly creatures or plants are those that belong to the Otherworld, the home of the Tuatha De Dannan. At their core, they are the same creatures that belong to our world, but more dangerous and more wild. The whole of the Otherworld glows with a soft bluish-silver light, and this light is collected and emitted by these creatures, giving them a softly luminescent shine of blue, silver, gold, and green. These animals seem to have a strange light coming from their eyes, as if a fire was burning just inside. The animals grow larger than those of our world, and the plants can become truly enormous.
Behaviorally, animals with this template become more social, and congregate in larger groups. They also tend to protect their territory fiercely from intruders, but they will usually let Tuatha De Dannan pass.

This is an inherited template. It is gained through generations of exposure to the Otherworld. If these creatures were removed from the Otherworld, after several generations they would revert back to their natural form. This template can be added to any non-sentient creature or plant (referred to hereafter as the base creature).

If the base creature is a plant, then it gains 2 size categories. If it is an animal, it gains one size category.
Animals become magical beasts. Recalculate hit dice, with the increase in hd category (next section) added to this.